Journal of Magnesium and Alloys最新文献

{"title":"Improvement in electromagnetic shielding effectiveness and mechanical properties of ultrafine Mg98.5Zn0.5Y alloy via friction stir processing","authors":"Guangyu Zhang, Jialiang Dong, Ziyi Li, Zhongxue Feng, Jun Tan, Xianhua Chen, Jianhong Yi, Fusheng Pan","doi":"10.1016/j.jma.2025.02.011","DOIUrl":"https://doi.org/10.1016/j.jma.2025.02.011","url":null,"abstract":"A novel Mg_98.5Zn_0.5Y alloy sheet with ultrafine grains and exceptional electromagnetic shielding performance has been fabricated using friction stir processing (FSP). This study investigates the impact of FSP on the microstructure, mechanical properties, and electromagnetic interference (EMI) shielding effectiveness (SE) of the alloy, specifically across three distinct layers within the stir zone (SZ): Top, Middle, and Bottom. The results reveal that the Mg₁₂YZn long-period stacking ordered (LPSO) phase is the predominant structure, undergoing significant grain refinement. The grain size is drastically reduced from 1.5 mm in the as-cast state to 12.6 µm, 10.0 µm, and 7.1 µm in the Top, Middle, and Bottom, respectively. This grain refinement and fragmentation of the LPSO phase into nanoscale particles result in a substantial enhancement of mechanical properties. The ultimate tensile strength (UTS) reached 358.2 MPa with an elongation (EL) of 15.1 %, reflecting a 344 % increase in strength and a 733 % improvement in ductility compared to the as-cast material. Simultaneously, the EMI SE was maintained between 70 and 110.4 dB over a broad frequency range (30–4500 MHz). Despite the nanoscale LPSO particles contributing minimally to EMI shielding, the lamellar LPSO structure demonstrated excellent performance through multiple electromagnetic wave reflections within the matrix. These findings underscore the dual benefits of FSP in improving both mechanical strength and electromagnetic shielding effectiveness, positioning this Mg_98.5Zn_0.5Y alloy for advanced applications in the electronics and telecommunications sectors.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"84 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revealing twin-induced deformation mechanisms of AZ31 Mg alloy sheet during warm deep drawing","authors":"Lei Tian, Lifei Wang, Xinwei Fu, Kunkun Deng, Xiao Wang, Liuwei Zheng, Hongxia Wang, Qiang Zhang, Kwang Seon Shin","doi":"10.1016/j.jma.2025.02.002","DOIUrl":"https://doi.org/10.1016/j.jma.2025.02.002","url":null,"abstract":"In this work, the {10–12} tensile twins are introduced to improve the drawability of the AZ31 Mg alloy sheet. Concretely, the drawing depth is increased by 32 % compared with the as-received sheet at 200 °C. This is because {10–12} tensile twins promote the occurrences of many deformation mechanisms during warm deep drawing, such as slips, detwinning, dynamic recrystallization (DRX) behaviors, etc. Further, based on the different stress states during deep drawing, these mechanisms and their competition relationships, as well as texture evolutions, are systematically studied. Combined with critical resolved shear stress (CRSS) and microstructure evolution, the global Schmid factor (GSF) obtained by quantizing stress states by stress tensor (σ) can accurately predict the activation trend of deformation mechanisms. It is found that the stress states have a reverse influence on the activation trend of the {10–12} twinning and detwinning. The change of stress states affects the competitive relationships between detwinning and DRX, and then affects the process and degree of DRX. The {10–12} tensile twins and large plane strain promote the activation of prismatic slips, and the larger plane strain also deflected the {10–12} twinning lattice. The {10–12} tensile twins and their induced deformation mechanisms can prominently weaken the basal texture and improve the drawability.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"37 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decoration of CoFe-LDH/porous MgO composite with ZrO2 nanoparticles for efficient photocatalytic removal of indigo carmine","authors":"Tehseen Zehra, Ananda Repycha Safira, Arash Fattah-alhosseini, Mohammad Alkaseem, Mosab Kaseem","doi":"10.1016/j.jma.2025.02.001","DOIUrl":"https://doi.org/10.1016/j.jma.2025.02.001","url":null,"abstract":"This study presents a novel photocatalytic system exploiting the unique properties of ZrO₂ and its integration with layered double hydroxide (LDH) films on porous coatings produced via plasma electrolytic oxidation (PEO). Herein, CoFe-LDH films were created on the porous surface of PEO-coated AZ31 Mg alloy using a hydrothermal treatment in cobalt and iron nitrate solutions, followed by a secondary hydrothermal process in a ZrO₂ solution for 10 h at 70 °C. The impact of ZrO₂ on the morphological, compositional, and photocatalytic performance was then compared to the case where ZrO₂ nanoparticles were electrophoretically incorporated into the porous PEO coating. Characterization results revealed that the ZrO₂-modified LDH coatings exhibited a dispersed flake-like structure with an increased surface area, a reduced band gap energy of 3.14 eV, and enhanced electron-hole separation. Experimental results demonstrated an outstanding 99.8 % degradation of indigo carmine within 15 mins, with remarkable multi-cycle stability over five consecutive cycles without significant performance decline. This system demonstrates faster degradation rates and greater durability compared to previously reported catalysts, underscoring its potential for effective and sustainable environmental remediation. The synergistic integration of ZrO₂, LDH, and PEO highlights a promising strategy for wastewater treatment, particularly for the removal of persistent organic dyes like indigo carmine.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"11 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The threat of hemorrhage from pelvic fractures: Clinicians seeking new solutions based on biomedical Mg implant","authors":"Qinghui Han, Xiaonong Zhang, Wenhui Wang, Kaiyang Wang, Tao Wang","doi":"10.1016/j.jma.2025.02.007","DOIUrl":"https://doi.org/10.1016/j.jma.2025.02.007","url":null,"abstract":"Biodegradable magnesium (Mg) materials offer significant advantages in trauma care due to their degradable nature and superior mechanical properties. This study reports the first successful use of degradable Mg clips in damage control surgery for pelvic fractures, addressing challenges associated with severe hemorrhage and high mortality rates (30–70 %). A 57-year-old male patient with pelvic fractures and traumatic shock underwent open reduction and internal fixation with Mg clips. At a six-month follow-up, imaging confirmed fracture healing, clip degradation, and no signs of rebleeding or infection, highlighting their effectiveness in precise hemorrhage control. Unlike traditional titanium clips, Mg clips degrade over time, eliminating the need for removal and reducing infection risks. This innovative approach combines Mg clips with conventional gauze packing, offering a more effective and safer alternative for managing pelvic trauma. Future large-scale clinical trials are necessary to validate these findings and establish Mg clips as a global standard for pelvic fracture treatment. Their portability and functionality hold promise for advancing emergency trauma care.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"85 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamic prediction of alloying element distribution in magnesium matrix composites","authors":"Xiwei Zhou, Yuan Yuan, Tingting Liu, Tao Chen, Jun Wang, Ligang Zhang, Liang Wu, Aitao Tang, Xianhua Chen, Andrej Atrens, Fusheng Pan","doi":"10.1016/j.jma.2025.01.022","DOIUrl":"https://doi.org/10.1016/j.jma.2025.01.022","url":null,"abstract":"The effect of alloying elements on the properties of magnesium (Mg) matrix composites is significant. The distribution of alloy elements between the matrix and the reinforcements plays a pivotal role in the element selection and compositional design of Mg-based metal matrix composite. This work used thermodynamics to study the equilibrium distribution coefficients of the 40 elements X (Be, Ca, Zn, Sn, REs, etc.) in the Mg-Ti and Mg-Zr systems at 573 K, 773 K and 973 K. In addition, the binary solution enthalpies were evaluated using the Miedema model to predict the bonding tendency of the element X with Mg, Ti and Zr. These research outputs provide valuable data and theoretical reference for Mg-alloy design and optimization.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"51 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Yb element on microstructure and mechanical properties of high-strength Mg-Sm-Gd(-Yb)-Zr extruded alloys","authors":"Nana Zhang, Xiaoya Chen, Quanan Li, Zeyu Zheng, Zheng Wu, Jiaqi Xie","doi":"10.1016/j.jma.2025.02.006","DOIUrl":"https://doi.org/10.1016/j.jma.2025.02.006","url":null,"abstract":"A high-strength magnesium alloy containing Yb was prepared through a simple hot extrusion process. The effect of Yb addition on dynamic precipitation, texture evolution, dynamic recrystallization mechanisms, deformation mechanisms, and strengthening mechanisms in as-extruded Mg-4Sm-3Gd(-2Yb)-0.5Zr (SGY0, SGY2) alloys was systematically investigated. The results indicated that the average grain size decreased from 4.17 µm to 1.48 µm with the addition of Yb. This extreme grain refinement greatly enhances the strength. The addition of Yb significantly facilitated the phase precipitation, but did not change the texture type. The non-dynamic recrystallized (unDRXed) grains exhibited a strong basal plane texture of <01<span><span style=\"\"><math><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">¯</mo></mover></math></span><span style=\"font-size: 90%; display: inline-block;\" tabindex=\"0\"><svg focusable=\"false\" height=\"2.202ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -846.5 570.5 947.9\" width=\"1.325ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><g is=\"true\"><g is=\"true\" transform=\"translate(35,0)\"><use xlink:href=\"#MJMAIN-31\"></use></g><g is=\"true\" transform=\"translate(0,198)\"><use x=\"-70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use><use x=\"70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use></g></g></g></svg></span><script type=\"math/mml\"><math><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">¯</mo></mover></math></script></span>0> parallel to the extrusion direction (ED), while the dynamic recrystallized (DRXed) grains showed a weaker rare earth texture, characterized by <<span><span style=\"\"><math><mrow is=\"true\"><mover is=\"true\"><mrow is=\"true\"><mn is=\"true\">1</mn></mrow><mo is=\"true\" stretchy=\"true\">‾</mo></mover><mn is=\"true\">2</mn><mover is=\"true\"><mrow is=\"true\"><mn is=\"true\">1</mn></mrow><mo is=\"true\" stretchy=\"true\">‾</mo></mover><mn is=\"true\">2</mn></mrow></math></span><span style=\"font-size: 90%; display: inline-block;\" tabindex=\"0\"><svg focusable=\"false\" height=\"2.202ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -846.5 2142 947.9\" width=\"4.975ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><g is=\"true\"><g is=\"true\"><g is=\"true\" transform=\"translate(35,0)\"><g is=\"true\"><use xlink:href=\"#MJMAIN-31\"></use></g></g><g is=\"true\" transform=\"translate(0,198)\"><use x=\"-70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use><use x=\"70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use></g></g><g is=\"true\" transform=\"translate(570,0)\"><use xlink:href=\"#MJMAIN-32\"></use></g><g is=\"true\" transform=\"translate(1071,0)\"><g is=\"true\" transform=\"translate(35,0)\"><g is=\"true\"><use xlink:href=\"#MJMAIN-31\"></use></g></g><g is=\"true\" transform=\"translate(0,198)\"><use x=\"-70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use><use x=\"70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"></use>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"185 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Degradation behavior, osteogenesis, and antimicrobial properties of Ga-coated ZK60 Mg alloys for medical implants","authors":"Lu Feng, Zhou Wu, Yang Huang, Lin Shen, Bo Qiao, Jiale Wu, Ning Wen, Jin Hu, Bin Deng","doi":"10.1016/j.jma.2025.01.024","DOIUrl":"https://doi.org/10.1016/j.jma.2025.01.024","url":null,"abstract":"The application of medical magnesium (Mg) alloys in implantable medical devices is promising due to the similar modulus of elasticity and biodegradability to human bone, which facilitates osseointegration. However, rapid degradation and loss of mechanical strength remain critical issues. To tackle these challenges, in this study, liquid metal gallium (Ga), which possesses non-toxicity, excellent biocompatibility, moderate chemical reactivity, and superior alloying capability, was used to develop a novel Mg alloy coating that can simultaneously enhance mechanical strength, reduce the degradation rate, and provide antibacterial and osteogenic properties. A unique, simplified coating process applied liquid Ga to the surface of ZK60 Mg alloy, and coatings of varying thicknesses were successfully fabricated. The phase composition of the Mg-Ga alloy layers was identified mainly consisting of Ga₅Mg₂ and Ga₂Mg. Vitro corrosion tests demonstrated that surface alloying of Ga with ZK60 effectively suppressed the degradation rate of the Mg alloy. Prolonged Mg-Ga alloying time improved human bone marrow mesenchymal stem cells (hBMSCs) adhesion, spreading, proliferation, and differentiation. The Mg-Ga alloy layer positively affected the early differentiation of osteoblasts and extracellular matrix mineralization, upregulating the expression of osteogenic-related genes and inhibiting osteoclast activity. Additionally, the Mg-Ga alloy exhibited excellent antibacterial properties through a combined effect of ion release and the formation of an alkaline environment. In short, the Ga-coated ZK60 Mg alloy demonstrated superior corrosion resistance, structural stability, cellular compatibility, osteogenic performance, and antibacterial capability, providing strong support for applying Mg alloys in medical implants.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"32 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ignition-proof magnesium alloys with rare earth elements: A novel framework to predict combustion phases, surface morphologies, and hidden features using heating rates","authors":"Muhammad Zeeshan Farooq, Yiyong Wu, Mingyi Zheng, Liangxing Lu","doi":"10.1016/j.jma.2025.01.014","DOIUrl":"https://doi.org/10.1016/j.jma.2025.01.014","url":null,"abstract":"This study presents a proposed interdisciplinary framework for developing ignition-resistant magnesium alloys and analyzing their combustion behavior. It focuses on both commercial AZ31, AZ91, WE43 and formulated Mg-Gd-Y-Zn-Zr alloys with various rare earth elements (REEs) contents. The research integrates experimental methods, heating rate simulations, advanced image processing, and machine learning (ML) techniques to identify key mechanisms that enhance ignition resistance, particularly for aerospace and other industrial applications. A novel alloy composition, Mg-8Gd-6Y-0.6Zn-0.6Zr, demonstrated exceptional non-combustibility in air. The study is systematically to classifies the combustion process into distinct phases and surface morphologies by leveraging supervised and unsupervised learning models based on unseen heating rate features. Advanced image processing techniques reveal dynamic surface morphology changes, including thermal deformation, melting spots, gas bubble formation, and transformations during saturation and post-melting phases, while unsupervised ML models also validate these outstanding predictions of surface morphology features. Additionally, the research highlights the synergistic effects of REEs in forming dense, protective oxide layers, refining microstructures, and delaying ignition. This phase-based analysis provides the combustion behavior of magnesium alloys, which is crucial for evaluating their performance in industrial fire scenarios.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"62 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Positive-negative shear asymmetry and anisotropy of a textured rolled plate of AZ31B Mg alloy under simple shear","authors":"Jiaxin Liu, Fulin Wang, Fenghua Wang, Shuai Dong, Jian Zeng, Li Jin, Jie Dong","doi":"10.1016/j.jma.2025.01.009","DOIUrl":"https://doi.org/10.1016/j.jma.2025.01.009","url":null,"abstract":"Mg alloy often undergoes shear deformation during industrial processing. While its anisotropy and tension-compression asymmetry have been thoroughly studied under uniaxial loading, the understanding for shear loading is still lacking. This study employed a rolled AZ31B plate with typical basal texture to investigate the shear behaviors. Positive and negative simple shear experiments were performed at different angles in the transverse plane, whereby the visco-plastic self-consistent model was calibrated to reveal the deformation mechanisms and predict the mechanical responses at various orientations. Positive-negative shear asymmetry is present because extension twinning preferentially operates in one shear direction but is suppressed in the opposite direction. Simple shear induces multiple twin variants, thus impedes twin growth and slows the consumption of matrix, as compared to in-plane compression. For slip dominated simple shear, the interaction between loading-induced rigid body rotation and slip-induced crystal rotation produces distinct hardening behaviors, namely orthogonally asymmetric mechanical responses at complementary loading angles, which is largely absent in uniaxial loading. Finally, simulation results verify that positive-negative shear asymmetry appears only when the deviatoric normal stress on the sheet plane is non-zero. Positive-negative shear asymmetry persists except for the conditions of shear plane parallel to sheet plane, or shear direction parallel or perpendicular to rolling direction.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"25 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143083121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of different metal-reinforcement phases on PEO discharge and coating growth behavior of AZ91 Mg-matrix composites","authors":"Jinchao Jiao, Yongrui Gu, Xiaoyun Ding, Jin Zhang, Yong Lian, Pengfei Gao, Xiaohui Zhang, Shengli Han, Kaihong Zheng, Fusheng Pan","doi":"10.1016/j.jma.2025.01.008","DOIUrl":"https://doi.org/10.1016/j.jma.2025.01.008","url":null,"abstract":"The strength and ductility of Mg alloys were improved through the introduction of metallic reinforcement phases. How the effect of different metal-reinforcement phases on the PEO discharge and coating growth behavior of Mg-matrix composites remains unclear. In this work, the influence of three metal-reinforcement phases (Nb, Mn, and Cu) on voltage evolution, coating morphology, coating phase composition, and corrosion resistance was investigated. The results indicate that Nb-reinforcement undergoes continuous spark discharges, resulting in the formation of a “volcano-like” localized morphology. In contrast, Mn and Cu-reinforcements do not directly participate in PEO discharges; instead, their oxidation products form “nodule-like” protrusions that limit the voltage rise rate. These behaviors are attributed to differences in the properties of the oxidation products of metal reinforcements and the Mg matrix, such as stability, Pilling–Bedworth ratio (PBR), band gap, dielectric constant, and conductivity. These characteristics influence the electrical structure of the PEO coating, thereby altering the PEO discharge and coating growth behavior of the composites. Finally, two models are proposed to describe the PEO discharge mechanisms in the two types of metal-reinforced AZ91-based composites.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"77 2 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143083122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}